FLAT GLASS GAUGES - MEDIUM PRESSURE
Flat Glass Gauges - Medium Pressure
These gauges are designed for the most common process conditions and can be used for Steam/Water applications. (See Gauges).
High pressure gauges are available in Model 481 Reflex and Model 491 Transparent. Illuminators and Frost Proof Extensions are also available.
Model 480 Reflex - has a single vision slot on one side of the chamber in which light can enter to determine liquid level. Above the liquid level, glass prisms reflect the surrounding light giving typically a silvery appearance. Below the level, the liquid fills the prisms causing the glass to become relatively transparent giving a typically dark appearance.
Model 490 Transparent - has a vision slot on both sides of the chamber allowing light to enter the gauge opposite the observer so that the level or the liquid and its characteristics can be seen.
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Features
- Armored Design
- Reflex and Transparent Design
- Maximum Protection
- Conforms to AISI/ASTM Specs
- Up to 12 Feet Long
- 10 Section Maximum
- 1/2"NPT Female Ends (std)
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Ratings
- Pressures up to 3000 PSIG
- Temperatures up to 800°F
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Materials
- Chamber: Carbon Steel 316LSS(Opt.)
- Covers: Carbon Iron
- Glass: Tempered Borosilicate
- Gaskets/Cushions: Grafoil GHP(std)
| Pressure Range for Glass Sizes in PSIG with Std. Gaskets | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Model | Temp | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 480 | 100°F | 3000 | 2910 | 2820 | 2725 | 2630 | 2535 | 2440 | 2345 | 2250 |
| 480 | 600°F | 2220 | 2150 | 2080 | 2040 | 1950 | 1875 | 1805 | 1740 | 1660 |
| 490 | 100°F | 2500 | 2315 | 2130 | 1940 | 1750 | 1565 | 1375 | 1190 | 1000 |
| 490 | 600°F | 1850 | 1720 | 1575 | 1435 | 1295 | 1160 | 1015 | 880 | 740 |
Temperatures up to 650°F with Aluminosilicate Glass.
| Models | Glass Size | Overall Length | Length Of Visible Glass | Minimum Centers if using the following Valve | |||||
|---|---|---|---|---|---|---|---|---|---|
| Reflex | Transparent | Rigid Gauge | Union Gauge | # of Sectns | |||||
|
450 460 |
498 |
450 460 |
498 | ||||||
| 480R11 | 490T11 | 1 | 5-1/4 | 3-3/4 | 8-1/8 | 9-7/8 | 11-1/8 | 11-7/8 | |
| 480R12 | 490T12 | 2 | 6-1/4 | 4-3/4 | 9-1/8 | 10-7/8 | 12-1/8 | 12-7/8 | |
| 480R13 | 490T13 | 3 | 7-1/4 | 5-3/4 | 10-1/8 | 11-7/8 | 13-1/8 | 13-7/8 | |
| 480R14 | 490T14 | 4 | 8-1/4 | 6-3/4 | 11-1/8 | 12-7/8 | 14-1/8 | 14-7/8 | |
| 480R15 | 490T15 | 5 | 9-3/8 | 7-7/8 | 12-1/4 | 14 | 15-1/4 | 16 | 1 |
| 480R16 | 490T16 | 6 | 10-5/8 | 9-1/8 | 13-1/2 | 15-1/4 | 16-1/2 | 17-1/4 | |
| 480R17 | 490T17 | 7 | 11-3/4 | 10-1/4 | 14-5/8 | 16-3/8 | 17-5/8 | 18-3/8 | |
| 480R18 | 490T18 | 8 | 13-3/8 | 11-7/8 | 16-1/4 | 18 | 19-1/4 | 20 | |
| 480R19 | 490T19 | 9 | 14-1/8 | 12-5/8 | 17 | 18-3/4 | 20 | 20-3/4 | |
| 480R24 | 490T24 | 4 | 16-1/2 | 15 | 19-3/8 | 21-1/8 | 22-3/8 | 23-1/8 | |
| 480R25 | 490T25 | 5 | 18-3/4 | 17-1/4 | 21-5/8 | 23-3/8 | 24-5/8 | 25-3/8 | |
| 480R26 | 490T26 | 6 | 21-1/4 | 19-3/4 | 24-1/8 | 25-7/8 | 27-1/8 | 25-7/8 | 2 |
| 480R27 | 490T27 | 7 | 23-1/2 | 22 | 26-3/8 | 28-1/8 | 29-3/8 | 30-1/8 | |
| 480R28 | 490T28 | 8 | 26-3/4 | 25-1/4 | 29-5/8 | 31-3/8 | 32-5/8 | 33-3/8 | |
| 480R29 | 490T29 | 9 | 28-1/4 | 26-3/4 | 31-1/8 | 32-7/8 | 34-1/8 | 34-7/8 | |
| 480R36 | 490T36 | 6 | 31-7/8 | 30-3/8 | 34-3/4 | 36-1/2 | 37-3/4 | 38-1/2 | |
| 480R37 | 490T37 | 7 | 35-1/4 | 33-3/4 | 38-1/8 | 39-7/8 | 41-1/8 | 41-7/8 | 3 |
| 480R38 | 490T38 | 8 | 40-1/8 | 38-5/8 | 43 | 44-3/4 | 46-1/8 | 46-3/4 | |
| 480R39 | 490T39 | 9 | 42-3/8 | 40-7/8 | 45-1/4 | 47 | 48-1/4 | 49 | |
| 480R47 | 490T47 | 7 | 47 | 45-1/2 | 49-7/8 | 51-5/8 | 52-7/8 | 53-5/8 | |
| 480R48 | 490T48 | 8 | 53-1/2 | 52 | 56-3/8 | 58-1/8 | 59-3/8 | 60-1/8 | 4 |
| 480R49 | 490T49 | 9 | 56-1/2 | 55 | 59-3/8 | 61-1/8 | 62-3/8 | 63-1/8 | |
| For Gauges of 5 to 10 Sections consult Sales Office | |||||||||
For Notes about Corrosion: ( See Gauges)